Delivery was fast and ok. However, were disabled by 5 batteries 3. This means that the voltage has collapsed immediately after insertion into the device from previously 3.2 V to 2.6 V and the batteries ready for the garbage (natural disposal :-)). Over the operating life of the remaining two I can only say at the appropriate time something. The seemingly cheap price into perspective so. In 2 of 5 are obtained for the 2 star rating.